Pump



Patented Mar. 27, 1928.

PATENT OFFICE.

CHARLES I. WILLIAMS, OF UTICA, NEW YORK.

PUMP.

Application 'led June 29, 1925. Serial No. 40,358.

Thisinvention appertains to a novel fuel feeding device for the carbureters of internal combustion engines and the pr1mary object of the invention is to provide autogasoline to a chamber for the carbureter from a supply tank, said means being so constructed as 'to normally maintain the gasoline at a constant level in the chamber.

A further object of the invention is to provide a chamber for supplying gasoline to a carbureter having novel means mounted therein for automatically controlling the level lof' the gasoline in thev chamber, the chamber having a suction pipe connected 'with the upper end thereof for communication with the intake manifold of the engine,

a feed pipe leading from the supplytank of the gasoline and an atmospherical communicatiommeans being provided for automatically shutting of Vthe atmospherical communication and forvopening up communication with the suction pipe, whereby the gasoline in the .chamber will' be held in ka constant level. Y' Y. y

A further object of theinvention is the provision of a single float for controlling the communication of they chamber with the atmosphere and the suction pipe. f

A further object of theinvention is to provideA novel means for permitting the connection of the chamber directly with a carbureter, thereby' eliminatingthe necessity of placing the chamber at a remote point from the carbureter, as nowl contemplated in vacuum feed devices for internal ,combustion engines.

- A gnu further .object of uw invention is' to provide a novel fuel control device of the above character which will insure a. positivey quick starting and stopping device which causes the level of the fluid in the float chamber to be practically maintained at a constant level, and which is so constructed asl to eliminate the necessity of priming the Vith these and other objects in view, the invention consists in the novel construction,

arrangement and formation of parts, as lwill be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which drawings: y

Figure l'is a vertical section through the improved fuelA control device showing the same applied to a conventional type of carbureter,Y v

Figure 2 isa horizontal section through the same taken on the line 2-2 of Figure .1 looking in the direction of the arrows,

Figure 3 -is a detail perspective view illustrating the means for controlling the atmospherical communication of the floatchamber,

the means for controlling the communication Referring to the drawings in detail,

wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indi -cates the improved yfuel control device or pump andV B a conventional carbureter, which can be considered as the-Holly type. As shown the carbureter B includes Athe usual mixing chamber Shaving formed on its lower en d a reduced body 6 provided with the axial bore?, theflower endof which terminates in an angularly extending passageway 8 for communication with lthe ordinary bowlof the carbureter (not-shown). In the larger typesof carbureters, a, check valve Vvof conventional form is placed in the passageway 8. The upper end of the extension ytS-,is providedwith a needle valve seat 9 for controlling the flow of the gasoline into the mixingi chamber p 5 andl this valve seat is adapted.- to have cooperating therewith la needle valve l0v which extends entirely through themixing chamber andout the upper end thereof. Theupper end of the neefdle valve can be Yprovide'd'witha suitable manipulating handle or lrnob'll. The carbureter is provided with the usual means for communication with the intake manifold air inlets and the like.

The fuel feeding device A embodies a chamber vor bowll which includes the circular side wall 16 and the fiat bottom wall V17. This bowl can be secured at its upper end to a flange 18 carried bythe carbureter 5. Thisflange forms `a top wall for ythe Figure 4 isa perspective view illustrating 'of the float chamber with the suction pipe.

the carbureter.

chamber. The extension 6 of the carbureter can be provided with a suitable vstud I19 which can extend axially through the bottom wall 17 of the chamber and a suitable nut 20 can be threaded on the stud in engagement with the bottom wall.`

It is to be noted at this point that the angular way 8 of the ycarbureter communicates with the chamber 15 adjacent to the lower end thereof.

, Extending into the upper end of the chamber is the fuel supply pipe 21 which extends.

lan angularly extending way 24 opens out through one side ofy the pipe and 'communi'- cates with the bore of the said pipe. This angular way is spaced below the top wall or flange 18 'of the chamber.

In accordance with this invention, a stud 25 isextended through the top wall or flange 18 of the chamber at a point diametrically opposite the point of connection of the suetion pipe with the chamber and this-stud' 25 is provided with an axial bore' 26 having its lower end terminating in a radially extending wayl 27 which communicates with the interior of the chamber. This stud permits at'mospherical.v communication to be had fromy the interior of the chamber.

In order to control the level of the gasoline within the chamber, a float is provided.v This float 30' is of annular lconstruction andi/surrounds the extension 6' ofthe carbureter and can be formed 1n any way and of any desired material, suchy as cork.

Secured to the upper surface of the float 30 at diametricalopposite points are sleeve valves 31 and 32. These sleeve valves 31 and' 32 are provided" respectively Yfor controlling the atmospherical communication of the chamber with the exterior of the chamber and the communication of the chamber with the suction pipe 22 and these sleeves slidably receive respectively the stud 25 and the angular vend 23 of the' said'suction, pipe.

As shown the'lower ends of the sleeves 31 and' 32' are provided with walls 34 and suitable fastening elements such as bolts or screws 35 are passed through the float and into the walls- 34' for retaining the sleeve valves in position. The sleeve valve 31 is provided with a port 36, which is adapted to communicate with the radially extending way 27 when the float is in its raisedl position which establishes communication with the atmosphere from the interior of the chamber. The upper end'k of the sleeve valve 32"is'provided with a. notch 37 which is adapt-edto communicate with the port or way 2li` when the floatis in its lowered position for permitting the suction pipe to communicate with the interior of the chamber. It is obvious that when the float is in its loweredgr positiony that rcommunication with the atmosphere is prevented in `view of the fact that vthe port 36 will be positioned below Ythe i yway 27. The upward movement Yof the float 1, the float will be in a raised positionfand thus communication with the suction pipe 22 will be cuto, whileatmospherical communication is had by means of the bore 26, way 27 and port'36. However when the level of the gasoline falls, the float will lower and the sleeve valves will slide. downward on the stud 25 and. the extension 23 of the pipe shutting oft communication with the way 27 and establishing communicationV with the, suction pipe 22.,A The suction to thepipe 22 will suck in the 'gasoline Vfrom the supply pipe 21 .into the chamber' and' when the sufficient amount of gasolinehas'been supplied to the chamber the float will again rise, so. as to shut olf communicationv with the suction pipe and again establishV communication with the atmosphere. gasoline is taken in the usual mannerV from The 1 the chamber to the carbureter through the bore 7 and way 8 of the extension 6.

Changes in details may be madewithout departing from the spirit or scope of this invention, but: -What I claim as new is: y

1. In. a device of the class described, the combination of'a chamber having communication with a fuel supply" pipe, a ysuction pipe and the atmosphere, the suction pipe extending into the upper end of the chamberv and having a radially extendingbore, the.

of the suction pipe extending into the chamber, the valves being provided wit-h ports for communication at different times with the port in the stud and a port in said suction pipe.

V2. In a device of the class described, the combination of a chamber provided with a top Wall having independent and separate connect-ions with a fuel supply'pipe, a suction pipe and the atmosphere, theV suction pipe having an angular end extending through the top wall into the chamber at one side thereof having a bore and a radial way communicating with the chamber, the atmospherical communication consisting of a stud extending through the top wall into the chamber having an axial way and a radially extending way, the axial way communicating with the atmosphere and the radial way with the chamber, the stud being arranged at a diametrically opposite point from the sup-k ply pipe, a oat arranged in the chamber, means for limiting the downward movement of the float, sleeve valves arranged on the upper surface of the oat at diametricallyopposed points for slidably receiving the stud and the angular extension of the suction pipe, the valves being arranged with ports disposed in different planes, and fastening elements extending rthrough the float into said valves for holding the same on the oat, Y

the valves engaging the top wall for limiting the upward movement of the oat.

3. In a device of the class described, the combination with a mixing chamber having an extension formed on the lower end thereof provided with'an axialway communicating with the chamber, the extension lmeans carried by the extension for limiting the downward movement of the float, and sleeve valves carried by the upper surface of the float for controlling the last two connections, the sleeve valves being adapted to limit Vthe upward movement of the float.

4. A device of the character described comprising abowl, a fuel pipe communicating therewith, valves .depending into the bowl and spaced from each other, and sleeves directly attached to the 4float and having directl sliding engagement with the valves to alternately open and close the same in the movement of the float.` Y

Intestimony whereof I aiix my signature.

' f CHARLES I. WILLIAMS. 

